Other aircraft needed worse than the B-29.
JAPAN: OSCAR, TOJO, GRACE, JUDY, NICK, BETTY
GERMANY: HE-177, HE-111
SOVIET: MIG-3, LAGG-3, PE-2 or 3, TU-2
BRITISH: Wellington, Beaufighter
US: Buffalo, Helldiver, B-25
ITALY: C. 1007 Bomber, SM. 75 Med bomber
Just to name a few.